add

frontend/app/lib/core/network/auth_interceptor.dart

@@ -0,0 +1,9 @@
+import 'package:dio/dio.dart';
+
+class AuthInterceptor extends Interceptor{
+  @override
+  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
+    // TODO: implement onRequest
+    super.onRequest(options, handler);
+  }
+}

frontend/app/lib/core/network/request.dart

@@ -0,0 +1,21 @@
+import 'package:app/core/network/auth_interceptor.dart';
+import 'package:dio/dio.dart';
+
+class Request {
+  static final Request _instance = Request._internal();
+  factory Request() => _instance;
+
+  late Dio dio;
+
+  Request._internal(){
+    BaseOptions options = BaseOptions(
+      baseUrl: "",
+      responseType: ResponseType.json,
+      contentType: 'application/json; charset=utf-8',
+    );
+    dio = Dio(options);
+    dio.interceptors.addAll([
+      AuthInterceptor()
+    ]);
+  }
+}